Change-speed gear.



G. E. STANLEY.

CHANGE SPEED GEAR.

APPLICATION FILED SEPT. 28. I911.

Patented Afig. 6, 1.918.

G.-E. STANLEY. CHANGE SPEED GEAR. AP'PucA'nou FILED SEPT. 28. I9! 1.

Patented Aug. 6, 1918.

2 SHEETS-SHEET 2 GEORGE ENOCH STANLEY, OF COVENTRY, ENGLAND.

CHANGE-SPEED GEAR.

Specification of Letters Patent.

Patented AugQfi, 1918.

Application filed September 28, 1917. Serial No. 193,711.

To all iii/tom it nn/1,1 com/om:

Be it known that ,l, Gnonon Enoon STAN- nny, a subject of the King of lflngland, residing in Coventry, Vi a'rwiclcshire, England, have invented certain new and useful Iniprovenients in Change b'peed Gears, of which the following is a specification.

This invention relates to improvements in change speed gears for motor vehicles, of the kind in which parallel driving and lay shafts are enq'iloyed, and a driven shaft is disposed concentrically with the driving shaft and geared permanently to the la} shaft; sliding gear wheels being provided on one of the shafts to cooperate with wheels on the other shaft. In such a construction the sliding i'neinber con'iprises one or more toothed wheels of different sizes having athrched at the sides one or more clutch-parts wl'iereol one clutch-part etl'ects a direct drive when the l'lltll'l JUPlS at one end. of its travel, a loot-hed wheel on the sliding member provides another speed when the inen'ilier is moved one step back along its travel, and the other clutch-part or a second wheel on the member etl'ects an engagement for a third speed when the member is moved another step haolc.

According; to this invention, the sliding inen'ilier has dogs at each side to clutch it to tlnshaft, which dogs engage withsplines on the shalt after the sliding toothed wheel is meshed with its appropriate toothed wheel on the lay sl'ialit. Other 'features of this invention will be evident from the Following description taken in conjunction with the aceornpanying drawings, in which Figure l is a vertical loi'igitudinal section through a change speed gear according to this invention;

.l "ig. 2 is a similar section through a mothtied construction. and

Fig. 3 is a horizontal longitudinal section sl'iowingr a reverse gear.

Referring to Fig. l, a driving shalt A and slia'l't ll are mounted in a gear hox .n l) is lmisely mounted on the driving shaft A and carries a toothed wheel it permanently meshed with a wheel l which is tl e smallest of three wheels 1 (I, and ii rig-ii ly mounted on the la) shalt B. A wheel l is loosely mounted on the driving shaft It and is permanently meshed with the wheel H on the lay shaft. A sliding wheel J is adapted to he moved along the shaft by a forked rod of the usual construc-. tion, so as (1) to clutch the wheel E to the shaft for direct drive, or (2) to mesh the wheel J with wheel (l for the second speed, or (5) to clutch the wheel Ito the shaft for the low speed. The clutch parts are arranged as follows :On each of the wheels I, J and E dogs K are provided for coupling the sliding wheel J to either I or F. Splines L are provided on the shaft, and dogs M on the sliding wheel can engage the splines in any one of the three speed positions. In order to facilitate the engagement of splines L and dogs M, each ring of splines is composed of alternately long and short elemeats, and the dogs are similarly arranged, so, that when moving" into engagement, first the longer projecting splines engage the longer projecting dogs and then the shorter splines and dogs engage.

To facilitate gear changing, either from second speed. to low or from second speed to high, the parts are so dimensioned that should the long dogs M abut cnd-on against the splines L the wheel J will still have a slight engagement with the wheel G so that it will be revolved at a different speed tothe drivingshatt, and the long dogs and splines will slip out of end on contact and will ongage properly. The wheel J will then have moved out of engagement with the'wheel G, and the wheel J will be running at the same speed as the drivingshaft, and as the gear wheel to be engaged (the gear wheel I in 'l ig l) is connectedwith the driven member of the gear hox it is almost certain to ho revolving at a ditfei e nt speed so that full engagement of the dogs hit with the splines L and the engagementof the gear wheel dogs K easily eli'eetcd. Similarly, in changing: from low or high into second speed the wheel J is first engaged with the wheel (lr. It the dogs then come end-on the differentratcs of revolution oi. the driving shaft and ot the sliding element will cause the dogs to slide out of cnd-on contact, when they will immediatelyengage properly.

lleterrinn to Figs. 2 and 3, A is the drivin; shaft and T3 is the lay shaft. mounted in a gear box C. The construction difl'ers from that hown in Fig. l in hat the sliding menthol ll carries two toothed wheels N and 0 instead of only one toothed wheel, and

liliel'e is no iifiOlZllEQl Wheel I fierinenently on the driving shaft. For the secondspeed set forth in eonneetion with Fig. l. 1e fie say when ehangmg frem 'secemleyeed e te high the sliding member engages Sglllllifl meshed Wifiljl the lay shaft For the lew seeei the sliclmg member J. is meved, emiwiseimtil the teethe'cl Wheel N meshes with the lay shaft Wheel H mil the tings en the sliding member engage appropriate splines direct drive the sliding member is movecl into enge ement with the toothed Wheel ms. (leseri ed in cenne ctien with 2. Gear changing is fecilit'iced in elie construe eien shown in Fig. 2, in the same mange? es llefi en Elie driving sha ft before leaving the mieldle wheel 0n the lay. shaft; encl when mmiing into second; speed, wheel 0 meshes wieli the middle Wheel on the lefy shaft leefei'lefihlie sliding member leaves the splines, edjeeent the Wheel E.

lie number of gears can, 0f course, be

veelved. aceerding to the number of 'verieus illustrated. gives a lower gemis? evei se sliding memeer e11; ef m1 (idle speed rte Elilllfif A all.

speeds desireel. a

A reverse shaft P 15 peevlded R, is permanently meshed with ilhi-i 'iifififilfiiill wheel H oftliefiley shei't'. l1 m pet in therevezse di'iye, the sliding member J is meveilendwlse unt l the webbed heel. ll shaft are-1i else the I megs en the slldmg member engage S oiiflthe driving shaft The a z'mngememk than fOIZ fOIWH Id 10w speed." In. Meier 1130 facilitate the 'meelimg' of the eeethedl wheels, the teeth may be Sllfiggfilfl;

That is te say, alternate izeeth are set in we rows se thee each/(1001:}! lies between pen 'te'the right 0? lefib of: it

'Wlmt 1' claim as my lave-mien e36. desire to seeui'e by Lehters Patent is:- ii. in a, change speed'gear/fer moiety veliieles tile ceimbinetien (if a arriving parallel therete; e '{lriven e lay e z axially alinediflwith the firi'vin shaft 1-; A

gear'eal permzmenfilyle the lay shaft; gear heels cer'mexi on slulme" member on the driving shaft eml aide-prim ts gear with :2,

'Wheel on the lay shelt;--d0gs-en each side of the sliding member; enal splines en the drivmgsheft'ize engage and spaced lenglbudmelly'sees 1e engage flee dogs after the slidiiig member. ieethecl wheel meeheei With'e "teefiiiecl wheel elitlie ley sheftl. v-- h 2.1nachenge-speed gew fe hieles, the cembinetieeeff 2-; will meter we" hicles, the cam in we teeilled Wheels Q, R, the smaller el Wlilfill,

",eee

geared permanently to the lay shaft; gear Wheels carried on e she ling member on the driving shaft end sedap ced $0 geez with,

Wheels on the ley shaft; (legs on each side of the slidin member and splines on the driving she t is engage said (logs and spaced. longitudinally an as te engage the dogs after e toothed Wheel on the sliding member is meshed with its appropriate weighed Wheel on the lay shaft.

3,111 a chem -e speecl gear for meter veinal ien of a driving shaft; a, lay shaft sm'ellel thereto; e cli'iven shaft exielly elined; with the driving shaft and geerecl peemenently t0 the lay shaft; gee? whee enameled en e sliding member on the driving shaft and adapted. in gear with wheels on the levy shaft; alternately leng and short dogs arranged in a, ring on each side of the sliding member; and wirespendlingly leng enql, short splines 'en the firiv'mg; sheffi to engage said; clegs, which splines are spaced longitudinally so as to engage the Clegs alters, toothed Wheel ell-the sliding member is meshed with its appropriate teelzleefl wheel en the lay shaft.

Ilia e chem e speed gear for meter vehicles, the eoml ination of a driving shaft;

high erlew speed, the member? en "ages thesplines on ill-e diriving'shei i; lie- :tesce leevingelie middle speei'l Wl'ieel em nine my slieft end similarly ehe serial, middle speeclwheel meshes with lille sliding memthe lemiei" leaves the eplii'ies 4 in, e dim-"We speed gear 55m. meme veemu il'miien 0i 2: driving shale;

' gswellel tlierete; e, elineel. with elie delving shaft and ed. en a sliding. m'embe en the and edeyitecl to gear with the lay shaft; dogs en eecliside of the sliding member; splines en the drivleg shaft te engage said degsenel spaced m as to engage-the elegs at er s ieetlm el en the sliiling member is meshes? W1 1 llIS eppeepeieie melt/hail Wheel en. izhe eml e reverse gear cem pri e pemllel fie the elriw she-la; etmfzl we webbed "wlaeele'keyeii 3e nenily to the ley shaft; gee!" t: (legs on each side driven emma tnereverse shaft one of which is permanently meshed with the largest of the lay shaft wheels and the other is adapted to mesh with the smaller of the toothed Wheels in testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEORGE ENOCH STANLEY. Witnesses ALBERT BROWN, SIDNEY JOHNSON. 

